Annealing-box.



J. A. HELLSTROM.

v ANNEALING'BOX. APPLICATION FILED MAY20. 1918.

1,274,538 Patent-ed Aug. 6, 1918.

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' -1atented Aug. 6, 1918.1

Original application med February 18, 1818, Serial 110. 816,880; Divided and this application fled Kay 80, I

I 1918. Serial 80.888588.

"To all whom it may concern.-

Be it known that 1, JOHN A, Hnnnsrrom, a subject of the Kin dom of Sweden, residing at Woodlawn, eelin ,in the county of Ohio and State of West irginia, have invented certain new and useful mprovements in Annealing-Boxes of which the. following is a specification, re erence being bad therein to the accompanyin drawing.

This invention re ates to improvements in annealing boxes, and its obJect is to so construct the top,.sides and ends of the box that the expansion and contraction thereof is so taken care of. that cracking, buckling and caving-in of the box is prevented under the severe heat to which it Is subjected.

My improvement relates more particularly to what is usually termed flat roof top annealing box, but the improvement may be utilized in connection with'an arch roof.

In the accompanying drawings- Figure 1 is a side elevation showing an annealin box with my improved construction app ied thereto.

Fig. 2 is an end elevation of Fig. 1. Referring now, to the-drawings 1n which like characters represent the same parts, 1 is. an elongated annealing box. Formed in the roof of this box are a plurality of coves 2, which are substantially Ushape 1n cross-section, and these ooves extend across the roof of the box an slightly down each side thereof, as shown. Located at each side of these U-shaped grooves 2, are

ribs 3,-which' extend parallel the grooves and form the side walls thereof, and the ribs like the grooves extend across the top of the box and slightly down its sides, as shown at 4. Connectin these. transverse ribs 3 are longitudinal ribs 5, and a central rib 6 extending longitudinal the roof from the end ribs 3, and partially down the ends of the box, as shown in Fig. 2.

The object of the U-shaped grooves 2 in the roof, is to take care of the longitudinal expansion of the box, thereby preventing the roof from-.cracking,-due to contraction, because the circular parts formed by the grooves 2 will naturally bend in both the I. contraction and expansion.

The inverted sections formed by these grooves 2 will also act '.as stifleners for the roof, which will prevent the buckling or cracking of the roof, which often ha pens in the flat roof type of annealing oxes.

The ribs 3, 4, and 5 of the top of the box are placed at intervals and revent any portlon of the roof from buck ing between the mverted sections 2, and owing to the fact that these ribs extend down somewhat on the side of the box,'they prevent the sidesends of the rib 8 and a central rib 11. Connecting the curved ribs 7, 8, 9 and 10, and the central rib 11, is a centrally located and longitudinally extending rib 12, thejendsof this rib 12 extending beyond the master oblong rib 7. The ends of the box are provided with a lar e circular rib 13, and a smaller circular rib-14 embraced within the former circular rib. Radiating from these ribs are the ribs 15, 16, 17, 1s, 19, 20 and 21.

These oblong, curved, and straight ribs on the sides and ends of the box, serve to take care of the longitudinal and cross-wise expansion and contraction, and owin to their oblong shape they will move wit the expansion and contraction of the box, and prevent it from cracking or buckling. These ribs also serve to straighten the sides and ends of the box.

Referring againto the sides of the box, it will be noticed that the oblong and curved ribs 7', 8 and 9 are connected by outwardly radiating ribs 22, and that the lower radiating ribs 22 extend to the bottom of the box and that ribs 23 radiate outward from the ends of the master oblong rib 7 to the edge Havmg thus described my invention, what L laim and desire-to secure by Letters Pateiit is It. An annealing box formed as an integral structure having its top provided with a plurality of transversely extending I U- shaped grooves, the edge walls of which are formed of ribs extending parallel to the said grooves to take care of the expansion" and 1 caving in.

2. An annealing box formed as an integral structure, having a flat top provided with a plurality of transversely'extending U-shaped grooves, the edges of the grooves formed of ribs extending transverse'the box and parallel the grooves, and ribs extending longitudinal the box between the curved and connecting them, for the purpose described.

1O rin annealing box formed as an in :11 structure bavingva top provided with plurality of transversely extending U- sped grooves, its ends and sides provided r with curved and radiating ribs, for the purpose described.

contraction of the top and prevent it from areeee a. An annealing box formed as an in tegral structure having its top provided with a plurality of transverse grooves havtheir edges formed of ribs, and its side provided with an oblong rib connected with the ribs of said grooves and its ends provided with circular ribs connected by a radiating rib, with the two end ribs of the grooves, for the purpose described. 5. An annealing box formed as an integral structure having its top provided with a plurality of U-shaped grooves, the

' edges of which are formed of ribs, the sides of the box provided with a plurality of oblong shaped ribs embracing curved ,ribs, the ends of the box provided with circular and radiating ribs, the parts combined for the purpose described,

in testimony whereof I hereunto afiix my signature in the presence of two witnesses.

Jill-1N Witnesses:

r1. lldANION, M. TEORNBERRY. 

